实际上我已经读过一些关于此的问题......
这是我使用的代码
auto = (ListView)findViewById(R.id.auto);
String[] projection = new String[] {Browser.BookmarkColumns._ID,Browser.BookmarkColumns.TITLE,Browser.BookmarkColumns.URL};
String[] displayFields = new String[] {Browser.BookmarkColumns.TITLE, Browser.BookmarkColumns.URL};
int[] displayViews = new int[] { R.id.text1,R.id.text2 };
Cursor cur = managedQuery(android.provider.Browser.BOOKMARKS_URI,projection, null, null, null);
//auto.setAdapter(new SimpleCursorAdapter(this, R.layout.mylist, cur,displayFields, displayViews));
myAdapter apt = new myAdapter(this, R.layout.mylist, cur,displayFields, displayViews);
auto.setAdapter(apt);
和myAdapter类
class myAdapter extends SimpleCursorAdapter{
private Cursor c;
private Context context;
public myAdapter(Context context, int layout, Cursor c, String[] from,
int[] to) {
super(context, layout, c, from, to);
// TODO Auto-generated constructor stub
this.c = c;
this.context = context;
AutoList att = new AutoList();
mListView = att.auto;
}
@Override
public View getView(int pos, View inView, ViewGroup parent) {
View vix = inView;
if (vix == null) {
LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
vix = inflater.inflate(R.layout.mylist, null);
}
this.c.moveToPosition(pos);
String title = this.c.getString(this.c.getColumnIndex(Browser.BookmarkColumns.TITLE));
String cont = this.c.getString(this.c.getColumnIndex(Browser.BookmarkColumns.URL));
TextView text1 = (TextView) vix.findViewById(R.id.text1);
text1.setText(title);
TextView text2 = (TextView) vix.findViewById(R.id.text2);
text2.setText(cont);
Button butt = (Button) vix.findViewById(R.id.button);
butt.setOnClickListener(mButt);
return vix;
}
private OnClickListener mButt = new OnClickListener() {
@Override
public void onClick(View v) {
final int position = mListView.getPositionForView((View) v.getParent());
Log.v("BUTT", "Title clicked, row "+position);
}
};
然而，当我点击按钮时，我仍然会遇到很多错误：
04-10 22:30:55.152: ERROR/AndroidRuntime(695): FATAL EXCEPTION: main
04-10 22:30:55.152: ERROR/AndroidRuntime(695): java.lang.NullPointerException
04-10 22:30:55.152: ERROR/AndroidRuntime(695): at com.auto2.AutoList$myAdapter$1.onClick(AutoList.java:113)
04-10 22:30:55.152: ERROR/AndroidRuntime(695): at android.view.View.performClick(View.java:2408)
04-10 22:30:55.152: ERROR/AndroidRuntime(695): at android.view.View$PerformClick.run(View.java:8816)
04-10 22:30:55.152: ERROR/AndroidRuntime(695): at android.os.Handler.handleCallback(Handler.java:587)
04-10 22:30:55.152: ERROR/AndroidRuntime(695): at android.os.Handler.dispatchMessage(Handler.java:92)
04-10 22:30:55.152: ERROR/AndroidRuntime(695): at android.os.Looper.loop(Looper.java:123)
04-10 22:30:55.152: ERROR/AndroidRuntime(695): at android.app.ActivityThread.main(ActivityThread.java:4627)
04-10 22:30:55.152: ERROR/AndroidRuntime(695): at java.lang.reflect.Method.invokeNative(Native Method)
04-10 22:30:55.152: ERROR/AndroidRuntime(695): at java.lang.reflect.Method.invoke(Method.java:521)
04-10 22:30:55.152: ERROR/AndroidRuntime(695): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-10 22:30:55.152: ERROR/AndroidRuntime(695): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-10 22:30:55.152: ERROR/AndroidRuntime(695): at dalvik.system.NativeStart.main(Native Method)
就是这样！ 我希望不会被弄清楚这么难！
谢谢！
答案 0 :(得分：19)
实际上，我使用了相同的方法 - 只是添加了转换父布局，我得到了没有异常的位置
public void deleteButtonClick(View v) {
//TODO Remove favorite - DB + file system
Toast.makeText(this, "Deleting bookmark", Toast.LENGTH_SHORT).show();
final int position = getListView().getPositionForView((LinearLayout)v.getParent());
if (position >= 0) {
Favorite o = (Favorite) this.getListAdapter().getItem(position);
}
}
我的listview行布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res/com.bbox.application"
android:orientation="vertical" android:layout_width="fill_parent"
android:layout_height="fill_parent">
<com.markupartist.android.widget.ActionBar
android:id="@+id/actionbar" app:title="@string/ac_title" style="@style/ActionBar" />
<ListView android:id="@+id/android:list" android:layout_width="fill_parent"
android:layout_height="wrap_content" android:layout_weight="5"
android:background="@drawable/categrory_bckgr" />
<TextView android:id="@+id/android:empty"
android:layout_width="fill_parent" android:layout_height="wrap_content"
android:text="@string/main_no_items" />
</LinearLayout>
我希望它会有所帮助。
答案 1 :(得分：2)
更简单的解决方案可能是当您的Activity实现OnClickListener并将（已转换的）Context作为OnClickListener设置为您在Adapter中所需的任何视图时。有关更强大的代码，您可以使用instanceof进行检查。
public class MyActivity implements OnClickListener {
// ...
}
public class MyAdapter extends CursorAdapter {
@Override
public void bindView(View view, Context context, Cursor cursor) {
final TextView tv = (View) view.findViewById(R.id.text1);
setOnClickListener((OnClickListener)context);
tv.setTag(cursor.getPosition());
}
}
为方便起见，您可以将适配器中的项目位置设置为视图的标记。这样您就可以轻松地在适配器中查找整个项目。
答案 2 :(得分：2)
我们可以通过在适配器的getView方法中实现onClickListener来获得该位置。
ADAPTER：
public class DetailsListAdapter extends BaseAdapter {
Context context;
ArrayList<Profile> data;
public DetailsListAdapter(Context context, ArrayList<Profile> data) {
this.context = context;
this.data = data;
}
@Override
public int getCount() {
return data.size();
}
@Override
public Object getItem(int position) {
return data.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder viewHolder;
if (convertView == null) {
convertView = LayoutInflater.from(context).inflate(R.layout.list_item_logs_details, null);
viewHolder = new ViewHolder();
viewHolder.btn = (Button) convertView.findViewById(R.id.log_details_1_a);
viewHolder.btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.d("statusPosition","position "+position);
}
});
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
return convertView;
}
public static class ViewHolder {
TextView tv2, tv3, tv3a, tv4, tv4a;
Button btn;
}
}
答案 3 :(得分：1)
带可点击按钮的ListView !!!
嗯......，这是解决我的问题的粗略方法。所以....
item.xml：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:orientation="horizontal"
android:layout_height="wrap_content">
<TextView android:id="@+id/showTv"
android:layout_alignParentLeft="true"
android:gravity="center_vertical"
android:textSize="24dip"
android:layout_height="wrap_content"
android:layout_width="wrap_content" />
<RelativeLayout android:id="@+id/jjjj"
android:layout_alignParentRight="true"
android:layout_height="wrap_content"
android:layout_width="wrap_content">
<Button android:id="@+id/gointoBt"
android:focusable="false"
android:layout_alignParentRight="true"
android:text="abc"
android:layout_height="wrap_content"
android:layout_width="wrap_content"/>
<Button android:id="@+id/chooseBt"
android:layout_toLeftOf="@id/gointoBt"
android:layout_marginRight="10dip"
android:text="text"
android:focusable="false"
android:layout_height="wrap_content"
android:layout_width="wrap_content"/>
</RelativeLayout>
MySimpleAdapter：
import ........;
public class MySimpleAdapter extends SimpleAdapter {
private final Context context;
private List<Map<String, Object>> data;
private int resource;
private String[] from;
private int[] to;
public MySimpleAdapter(Context context,List<? extends Map<String, ?>> data, int resource, String[] from,
int[] to) {
super(context, data, resource, from, to);
this.context=context;
this.data=(List<Map<String, Object>>) data;
this.resource=resource;
this.from=from;
this.to=to;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = ((Activity)context).getLayoutInflater();
View rowView = inflater.inflate(resource, null, true);
Map<String, Object> medMap=data.get(position);
final TextView[] showTv=new TextView[from.length];
for (int i = 0; i < from.length; i++) {
showTv[i]=(TextView)rowView.findViewById(to[i]);
showTv[i].setText(""+medMap.get(from[i]));
}
Button btn=(Button)rowView.findViewById(R.id.gointoBt);
Button.OnClickListener mOkOnClickListener = new Button.OnClickListener()
{
public void onClick(View v) {
Log.v("ttttttt", ""+showTv[0].getText());
Toast.makeText(context,""+showTv[0].getText(), Toast.LENGTH_LONG).show();
}
};
btn.setOnClickListener(mOkOnClickListener);
Button btn2=(Button)rowView.findViewById(R.id.chooseBt);
Button.OnClickListener mOkOnClickListener2 = new Button.OnClickListener()
{
public void onClick(View v) {
Log.v("hhhhhhh", ""+showTv[0].getText());
Toast.makeText(context,"abc"+showTv[0].getText(), Toast.LENGTH_LONG).show();
}
};
btn2.setOnClickListener(mOkOnClickListener2);
return rowView;
}
}
Activty：
import .......;
public class ActivityMain extends Activity {
ListView listview;
List<Map<String,Object>> data;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setTitle("My work");
prepareData();
listview =new ListView(this);
MySimpleAdapter adapter=new MySimpleAdapter(this,data,R.layout.item,new String[] {"uu"},new int[]{R.id.showTv});
listview.setAdapter(adapter);
setContentView(listview);
}
private void prepareData(){
data=new ArrayList<Map<String,Object>>();
Map<String,Object> item;
item=new HashMap<String,Object>();
item.put("uu", "hello");
data.add(item);
item=new HashMap<String,Object>();
item.put("uu", "myyou");
data.add(item);
item=new HashMap<String,Object>();
item.put("uu", "piero");
data.add(item);
}
}
感谢那位非常善良的人提供这个令人敬畏但最强大的教程.... 这里的任何人都不能给新人....
答案 4 :(得分：1)
我认为还有一个更好的方法。您可以使用按钮添加一个标记作为位置 （button.setTag（））方法，每当用户点击按钮时，只需取这个按钮的标签即可。它会更容易。
谢谢和问候 拉胡
答案 5 :(得分：1)
非常简单。在适配器类getView方法中，将 int position 更改为最终int位置。
public View getView(final int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View row = inflater.inflate(yourcustomizeditemview.xml, parent,
false);
Button btn= (Button) row.findViewById(R.id.btn);
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Toast.makeText(context, " "+position, Toast.LENGTH_SHORT).show();
}
});
return row;
}
现在点击Button点击Toast会显示Button所在项目的位置。
答案 6 :(得分：0)
onClick()似乎mListView为空。有可能
auto = (ListView)findViewById(R.id.auto);
返回null，因为在当前布局中找不到R.id.auto的视图。我会在该行之后放置一个调试器断点并查看。
答案 7 :(得分：0)
你执行这个
btnNxt = (Button) findViewById(R.id.btnNext);
btnNxt.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
//Here I need to get that position
});
在getView方法中？如果是这样，那很容易
btnNxt = (Button) findViewById(R.id.btnNext);
btnNxt.setTag(position);
btnNxt.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
int position=(Integer)arg0.getTag();
});